Pick.



A. GOTTVALD.

PICK.

APPLIGATION'PILED FEB. 11, 1910.

Patented Feb. '7, 1911 wi flweom: I I Q WEED ADOLF GOTTVAIID, OF CHICAGO, ILLINOIS.

PICK. 983,859, Specification of Letters Patent. Patented Fgb, Z, 1911, Application filed February 11, 1910. Serial No. 543,262. To all whom it may concern: The pick-points b are made of the ordinary Be it known that I, ADOLF Gorrvano, a construction and provided with shoulders 19 sub ect ofthe King of Hungary, residing 1n at their upper ends, adjacent to the outer Chicago, in the county of Cook and State ends of the shanks, so that the pick-points when their shanks are driven to thelr full extent into the sockets of the pick-head abut against the ends of the of Illinois, have invented certain new an" useful Improvements in Plcks, of which the following is a speclfication. by their shoulders 79 This invention relates to picks of that pick-head. Between the flat bottom-faces kind which are used by workmen on roads, of the shanks b of the pick-points b and railways, quarries and in other occupations. the bottom of the sockets a are driven in wedge-shaped keys cl by which the pickpoints are firmly held in position in the sockets, after which the pick is ready for use. With each blow by the pick, the pick-points will be driven in farther into the sockets and The object of the invention is to provide 1 an improved pick in which the points are easily and readily detachable from the eyeportion of the pick so as to facilitate the sharpening of the points or the replacing of old and worn out points by new points or held more firmly therein so as to obviate by other tool-points, if desired; and for any possibility of working loose in the this purpose the invention consists of a sockets.

pick-head provided with an ordinary han- The rectangular cross-section of the shanks in connection with the rectangular cross-section of the sockets prevents any turning movement of the pick-points in the head a, while the position of the pick-points in case they should get loose is reesta lished by driving the wedge-shaped keys farther into the space between the sockets and the shanks of the pickpoints.

Then it is desired to remove the pickdle, the extremities of saidpick-head being provided with tapering longitudinal sockets and with openings transversely to said sock' ets, and pick-points provided with tapering shanks inserted in said sockets and retained therein by means of wedge-shaped keys that are driven in between the shanks of the pickpoints and the bottoms of the sockets, as will be fully described hereinafter and finally pointed outin the claim. points for sharpening them, or for replacing In the accompanying drawing, Figure 1 them by new points, a wedge-key or other represents a side-elevation of my improved tapering tool 6 is placed into the transverse pick, Fig. 2 is a vertical longitudinal sccopenings 0, as shown in dotted lines in Fig. tion of the same, Fig. 3 is a top-view, and 2, and driven into the same against the inner Fi i is a vertical transverse section on line ends of the keys d, so that by a few taps D I a at, t, Fig. 2, drawn on a larger scale. on the wedge-key the shanks of the plck- Similar letters of reference indicate corpoints and their locking keys will be readily responding parts throughout the several forced out of the sockets of the pick-head.

views. Having thus described my invention, 1 Referring to the drawing, a represents the claim as new and desire to secure by Letters Patent:

In combination, a pick-head provided with a socket having smooth front and rear-faces converging toward each other at the inner end of the socket, a rearwardly curved pickpoint provided with a tapering shank having a smooth front-face continuously engaging the front-face of the socket, said shank having a smooth rear-face forming with the body-part of said pick-point a continuous flat face, and forming with the rear-face of the socket a recess tapering toward its inner end, and a wedge-key in said recess with its rear-face continuously engaging the rear-face of the socket and with its frontface from end to end continuously engaging flat face formed by the rear-face of the head of a pick which is provided with the ordinary handle 6 that is inserted into the eye a of the head a. The ends of the picki head are provided with tapering longitudinal sockets a and intermediately between the inner ends of said sockets and the eye of the pick with transverse openings 0. The sockets a in the ends of the pick-head a preferably made of rectangular crosssection and concaved at their upper edge, as shown in Fig. 4c, and conically tapering from their outer toward their inner ends. Into the sockets a are inserted the shanks b of the pick-points b the cross-section of the shanks corresponding to the cross-section of the sockets a but be1ng somewhat smaller in thickness than the height of the sockets. l the shank and body-part of the pick, the whole rear-face of said b0dyportion being substantially fiat and the head of said wedge key being fully exposed, said picl -head be- 5 ing provided with a transverse opening communicating with said socket, the front-face of said pick-point being provided With a projecting shoulder adjacent to the end of the pick-head, the front-face of said socket 1c and shank being correspondingly forwardly l curved, whereby said socket will not receive said shank when the pick is in reverse posr tion.

In testimony, that I claim the foregoing as my invention, I have signed my name in 1 presence of two subscribing witnesses.

ADOLF GOTTVALD. l/Vitnesses PAUL GoEPEL. JOHN MURTAGH. 

